I'm single and miserable

I'm so sick of people telling me to love myself first. I'm so sick of people telling me that it'll show up when I least expect it. After being in a 5 year relationship that ended about 2 years ago, I have not been able to enter a steady relationship since. I dated two guys for a few months after that but I haven't been in an official relationship. My 4 best friends (3 girls, one guy) are all in relationships. I'm 20 and they're all gone with their boyfriends/girlfriend for valentines weekend. I'm so fucking lonely and bitter and I don't get what's wrong with me. I go on dates and Snapchat guys but nothing ever actually gets to a relationship stage. I have tinder and bumble and have had them since the day after my breakup but they haven't helped. I go out a lot to parties and social events at college but that hasn't helped. Friends say they'll set me up and never do. Everything else is great in my life except for this. I've accepted that I'm just a relationship type person. It's not that I can't have a fulfilling life without a relationship, I can and I do, but I feel like these are the best years of my life and I'm completely wasting my time by not sharing them with a special guy. I keep getting played and it sucks. I get through my days feeling just fine but I've cried myself to sleep the past 3 nights and I'm sick of complaining to my taken friends because I don't want to seem so miserable. just needed to vent. ☹️